Improvement in compound hand or balance wheels for sewing-machines



. W. DAWES. I GompoundHand or Balance-Wheel for Sewing Machines.

No. 197,344. tented Nov. 20,1877.

INVENTOR ,Q Dnwm v WITNESSES ll. PETEQ FHOTO-LQYNOGRAPOIER. wAsnmuTOM. o c.

UNITE STATES PATENT OEEIcE.

, WILLIAM DAwEs, 0E LEEDs, ENGLAND.

IMPROVEMENT IN COMPOUND HAND 0R BALANCE WHEELS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 197,344, dated November 20, 1877; application filed October 5, 1877 patented in England, July 5, 1877.

To all whom it may concern:

Be it known that I, WILLIAM -DAwEs, of Kingston Grove, Leeds, in the county of York, England, engineer, have invented a new and useful Improvement in Sewing Machines,

' which improvement is fully set forth in and by the following specification, reference being had to the accompanying drawings. This invention relates to an improved com- I chine, and to' release theirgripe upon each other upon the reverse movement, so that one part will slip and the driving-shaft will remain stationary.

The object of my invention is to simplify the construction of the compound balance-wheel, and to provide for the two parts being conveniently grasped by the hand of the operator, for convenience in stopping the machine.

- I construct my'wheel in two parts, or as a double or compound wheel, one half or part of the wheel being cast with or attached to the V-grooved or small gut-wheel or pulley, in the usual manner, and running loosely with it upon the main shaft, or other equivalent part of themachine, and the other half or part of the wheel being secured to or fixed upon the said shaft or other part, or otherwise coupled to the machine, in such manner that the movement of it and the machine must be simultaneous.

, I'then causethe loose or free half or part of the wheel, whichever that may be,.to propel the fixed or coupled half or part, when turning the forward or working way only; and this I eifect by constructing, upon the center of what may be called the inner face of the loose half or part of the hand-wheeha cheese-likeboss or projection'havinganumber of pear or wedge shaped chambers or recesses sunk into it, and into each-of thesechambers I place, loosely,- a cyIinder or roller, of lead or other convenient or suitable metalor substance, and of a such size or diameter that when inthe large end of the said chambers or recesses they shall be caged in and carried by the same, without contact with other parts, and there-v fore without producing propulsion, but when they'are at or near the smaller end of the chambers they shall wedge and gripe against the inner surface of a ring cast upon the inner face of the fixed or coupled half of the wheel; and thus, without cutting or grooving the shaft, and without clicks or springs, or any further fitting or parts than those herein described, a safe, permanent, and convenient automatic fast and loose action is obtained.

In the accompanying drawings, which illustrate my invention, Figurel is a vertical elevation, and Fig. 2 a vertical section, of the compound wheel and the gripe or pawl action.

a is the fast or coupled half or part of the hand or balance wheel. I) is the loose or free half of the same. 0 is the gut-wheel or pulley. d is the main shaft of the machine. c is the boss or projection upon the loose part of the wheell' f f are chambers or recesses in the same. 9 g are rollers, and h the ring cast upon the fixed or coupled half or part of the wheel.

The web of the fast half a of the balancewheel is constructed of such shape as to con- I operate substantially as set forth.

whereby the said parts may travel together when moving forward and the loose part caused to slip upon the reverse movement.

' WILLIAM DAWES.

Witnesses:

EDWARD WHITELEY, J osn HENRY WHITAKER,

Solicitors Clerks, Leeds.- 

